Not working

just bought premium and kinda want a refund because it does not work or benefit me. and infinite vitality as well as the other cheats seem to apply to the ai which defeats the purpose of cheats! i just want to get through world tour but the bosses are to tanky and have way to much health. so help me out in understanding what's going on or please allow me to refund the premium as I didn't plan to use it for any other game.